KVM: nVMX: Implement support for EFER saving on VM-exit
Implement and advertise VM_EXIT_SAVE_IA32_EFER. L0 traps EFER writes unconditionally, so we always find the current L2 value in the architectural state. Signed-off-by: NJan Kiszka <jan.kiszka@siemens.com> Reviewed-by: NGleb Natapov <gleb@redhat.com> Signed-off-by: NPaolo Bonzini <pbonzini@redhat.com>
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